"@WaltMossberg learned why on a conference stage when an ad agency guy said the agency’s ads wouldn’t sponsor Walt’s new publication, recode. Walt: “I asked him if that meant he’d be placing ads on our fledgling site. He said yes, he’d do that for a little while. And then, after the cookies he placed on Recode helped him to track our desirable audience around the web, his agency would begin removing the ads and placing them on cheaper sites our readers also happened to visit. In other words, our quality journalism was, to him, nothing more than a lead generator for target-rich readers"

Since tracking people took off in the late ’00s, adtech has grown to become a four-dimensional shell game played by hundreds (or, if you include martech, thousands) of companies, none of which can see the whole mess, or can control the fraud, malware and other forms of bad acting that thrive in the midst of it.

Pro tip #1: don’t bet against Google, except maybe in the short term, when sunrise will darken the whole adtech business. Instead, bet against companies that stake their lives on tracking people, and doing that without the clear and explicit consent…